Contact the national office of IPMS for information on the Make-and-Take program. They can probably set you up with a potential source of supplies. Contact the local hobby shop for donations and/or discount offers for the students
I see a breakdown similar to:
Session 1: Overview, history, model types, safety, supplies
Session 2: Basic assembly, parts prep & glue (hands on/finish at home)
Session 3: Painting, brush/rattlecan/airbrush (hands on/finish at home)
Session 4: Decalling (hands on/finish at home)
Session 5: Show & tell (if you have time)